//
//  DSUnitListening.m
//  DSJY
//
//  Created by 冯华强 on 16/10/19.
//  Copyright © 2016年 dsjy. All rights reserved.
//  单元练习的列表对象(json)

#import "DSUnitListening.h"
#import "NSArray+Extension.h"

@implementation DSUnitListening

- (NSArray<DSUnitListeningContent *> *)randomAudioList
{
    if (_randomAudioList == nil && self.audio && self.audio.count != 0) {
        //数组乱序
        NSArray *audioList = [self.audio exchangeObjectList];
        _randomAudioList = audioList;
    }
    return _randomAudioList;
}

@end
